diff --git a/Dockerfile_alpine-bun b/Dockerfile_alpine-bun
index de36ad5..8f000c2 100644
--- a/Dockerfile_alpine-bun
+++ b/Dockerfile_alpine-bun
@@ -41,7 +41,11 @@ SHELL ["/usr/local/bin/bash-with-nvm"]
 ENV BASH_ENV=/etc/bash.bashrc
 
 # Install Node.js LTS via NVM and Bun
-RUN nvm install $NODE_VERSION_LTS \
+# TARGETARCH fix: QEMU buildx can report wrong arch via uname -m
+ARG TARGETARCH
+RUN NVM_MUSL_ARCH=$([ "$TARGETARCH" = "arm64" ] && echo "arm64-musl" || echo "x64-musl") \
+    && nvm_get_arch() { echo "$NVM_MUSL_ARCH"; } \
+    && nvm install $NODE_VERSION_LTS \
     && nvm alias default $NODE_VERSION_LTS \
     && nvm use default \
     && curl -fsSL https://bun.sh/install | bash
diff --git a/Dockerfile_alpine-deno b/Dockerfile_alpine-deno
index 2cee752..d818a14 100644
--- a/Dockerfile_alpine-deno
+++ b/Dockerfile_alpine-deno
@@ -42,7 +42,11 @@ SHELL ["/usr/local/bin/bash-with-nvm"]
 ENV BASH_ENV=/etc/bash.bashrc
 
 # Install Node.js LTS via NVM (Deno already installed from Alpine repos)
-RUN nvm install $NODE_VERSION_LTS \
+# TARGETARCH fix: QEMU buildx can report wrong arch via uname -m
+ARG TARGETARCH
+RUN NVM_MUSL_ARCH=$([ "$TARGETARCH" = "arm64" ] && echo "arm64-musl" || echo "x64-musl") \
+    && nvm_get_arch() { echo "$NVM_MUSL_ARCH"; } \
+    && nvm install $NODE_VERSION_LTS \
     && nvm alias default $NODE_VERSION_LTS \
     && nvm use default
 
diff --git a/Dockerfile_alpine-node b/Dockerfile_alpine-node
index 122a77d..87d8758 100644
--- a/Dockerfile_alpine-node
+++ b/Dockerfile_alpine-node
@@ -52,7 +52,13 @@ ENV PATH="$PNPM_HOME:$PATH"
 
 # Install Node.js LTS via NVM and pnpm
 # Use musl-specific builds from unofficial-builds for Alpine compatibility
-RUN nvm install $NODE_VERSION_LTS \
+# TARGETARCH fix: QEMU buildx can report wrong arch via uname -m, causing NVM
+# to download x64 binaries on arm64. We create a temporary uname wrapper to
+# ensure the correct architecture binary is downloaded.
+ARG TARGETARCH
+RUN NVM_MUSL_ARCH=$([ "$TARGETARCH" = "arm64" ] && echo "arm64-musl" || echo "x64-musl") \
+    && nvm_get_arch() { echo "$NVM_MUSL_ARCH"; } \
+    && nvm install $NODE_VERSION_LTS \
     && nvm alias default $NODE_VERSION_LTS \
     && nvm use default \
     && npm install -g pnpm \